--- zzzz-none-000/linux-3.10.107/sound/soc/pxa/pxa2xx-pcm.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/sound/soc/pxa/pxa2xx-pcm.c	2021-02-04 17:41:59.000000000 +0000
@@ -12,21 +12,21 @@
 
 #include <linux/dma-mapping.h>
 #include <linux/module.h>
+#include <linux/dmaengine.h>
+#include <linux/of.h>
 
 #include <sound/core.h>
 #include <sound/soc.h>
 #include <sound/pxa2xx-lib.h>
+#include <sound/dmaengine_pcm.h>
 
 #include "../../arm/pxa2xx-pcm.h"
 
 static int pxa2xx_pcm_hw_params(struct snd_pcm_substream *substream,
 	struct snd_pcm_hw_params *params)
 {
-	struct snd_pcm_runtime *runtime = substream->runtime;
-	struct pxa2xx_runtime_data *prtd = runtime->private_data;
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
-	struct pxa2xx_pcm_dma_params *dma;
-	int ret;
+	struct snd_dmaengine_dai_dma_data *dma;
 
 	dma = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
 
@@ -35,40 +35,13 @@
 	if (!dma)
 		return 0;
 
-	/* this may get called several times by oss emulation
-	 * with different params */
-	if (prtd->params == NULL) {
-		prtd->params = dma;
-		ret = pxa_request_dma(prtd->params->name, DMA_PRIO_LOW,
-			      pxa2xx_pcm_dma_irq, substream);
-		if (ret < 0)
-			return ret;
-		prtd->dma_ch = ret;
-	} else if (prtd->params != dma) {
-		pxa_free_dma(prtd->dma_ch);
-		prtd->params = dma;
-		ret = pxa_request_dma(prtd->params->name, DMA_PRIO_LOW,
-			      pxa2xx_pcm_dma_irq, substream);
-		if (ret < 0)
-			return ret;
-		prtd->dma_ch = ret;
-	}
-
 	return __pxa2xx_pcm_hw_params(substream, params);
 }
 
 static int pxa2xx_pcm_hw_free(struct snd_pcm_substream *substream)
 {
-	struct pxa2xx_runtime_data *prtd = substream->runtime->private_data;
-
 	__pxa2xx_pcm_hw_free(substream);
 
-	if (prtd->dma_ch >= 0) {
-		pxa_free_dma(prtd->dma_ch);
-		prtd->dma_ch = -1;
-		prtd->params = NULL;
-	}
-
 	return 0;
 }
 
@@ -84,18 +57,15 @@
 	.mmap		= pxa2xx_pcm_mmap,
 };
 
-static u64 pxa2xx_pcm_dmamask = DMA_BIT_MASK(32);
-
 static int pxa2xx_soc_pcm_new(struct snd_soc_pcm_runtime *rtd)
 {
 	struct snd_card *card = rtd->card->snd_card;
 	struct snd_pcm *pcm = rtd->pcm;
-	int ret = 0;
+	int ret;
 
-	if (!card->dev->dma_mask)
-		card->dev->dma_mask = &pxa2xx_pcm_dmamask;
-	if (!card->dev->coherent_dma_mask)
-		card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
+	ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
+	if (ret)
+		return ret;
 
 	if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
 		ret = pxa2xx_pcm_preallocate_dma_buffer(pcm,
@@ -122,23 +92,24 @@
 
 static int pxa2xx_soc_platform_probe(struct platform_device *pdev)
 {
-	return snd_soc_register_platform(&pdev->dev, &pxa2xx_soc_platform);
+	return devm_snd_soc_register_platform(&pdev->dev, &pxa2xx_soc_platform);
 }
 
-static int pxa2xx_soc_platform_remove(struct platform_device *pdev)
-{
-	snd_soc_unregister_platform(&pdev->dev);
-	return 0;
-}
+#ifdef CONFIG_OF
+static const struct of_device_id snd_soc_pxa_audio_match[] = {
+	{ .compatible   = "mrvl,pxa-pcm-audio" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, snd_soc_pxa_audio_match);
+#endif
 
 static struct platform_driver pxa_pcm_driver = {
 	.driver = {
-			.name = "pxa-pcm-audio",
-			.owner = THIS_MODULE,
+		.name = "pxa-pcm-audio",
+		.of_match_table = of_match_ptr(snd_soc_pxa_audio_match),
 	},
 
 	.probe = pxa2xx_soc_platform_probe,
-	.remove = pxa2xx_soc_platform_remove,
 };
 
 module_platform_driver(pxa_pcm_driver);